Spring suspension



Jan. 20, 1931. F. E. DAVIS SPRING susrsnsron gfiled Ma 14. 1928 signs, having a great number of leaves,

; ,2Q'bG1Ilg of a conslderable depth, 1s replaced byv Patented Jan. 20, 1931 'rLo'YnfEnsoN DAVIS, orNEwvoit'KfNL Y nssreNon'ro INTERNATIONAL oron NEW 'YonK; N. Y.,

A CORPORATION OF DELAWARE- srniNe-susrnNsroN' Application filed May 14,

- The present invention relates to spring suspensions for vehicles of-the type having four rear drivingwheels, JVherethe vehicle 1 is of atype'requiring thisarrangement of 5 driving wheels, the size thereof is usually such as to necessitate the provision of springs of considerable size. As the size of the springs increases, the inflexibility of the drivingtruck, or the mounting of the wheels upon the. frame, correspondingly increases 'andit has been foundthat this factor places a distinct limitation upon, the design of these elements.

This 1nvent1on relates to a spring-suspen- "lesion for vehicles of the above type, wherein complete flexibility between the individual wheels and between the wheels and frame is provided. The leaf spring of existing deand a spring having two series of load arms. The two series are secured rigidly together at their mid-sections and at this point, are pivoted or secured to the frame in a suitable manner.

The ends of each spring are mounted independently to the respective axles in such manner that relative elongation of one spring with respect to the other is accommodated as well as the relative movement of the elements 230 by reason of tipping of the axle.

As a further feature of; the invention, the spring ends are mounted independently at a given point in a housing which is pivoted to the axle, This pivoting permits tilting of the '35 axle without displacing the housing from as, normal vertical plane and the yielding non metallic material carried withinthe housing permits a slight transverse movement of the housing with respect to the spring to accom- 40 modate the slight shifting of the plane of the hopsing due to such pivotal movement of the ax e. V

Further objects and advantages will appear as the invention is described in'greater detail in connection with the accom an in drawings,wherein:

Figure 1 is a view in s1de elevat10n, partly in section, showing a spring construction n accordance with the present invention.

- to Figure 2 is a view in section, taken on line sieni athe sp nssi a e t ken a wan 1928. Serial No. 271504.

2-2 01? Figure 1, and looking in thedirection of the arrows. v

Referring to the above figures, a indicates a vehicleframe provided with forward and rearward rear axles b. In the form of drive in which the present invention "isembodied, these are dead. axles, thedrive being effected through jack; shafts cl carried upon the vehicle frame and receiving power from differentials 6:;Radius ro'dsfspacetheaxles b from the jack shafts d andare. adjustable as at f... i

P ssing through each axle b ateitherside thereof, arebushed apertures 12. for. receiv-' ing bolts 0 carried by a: yoke-shaped projec tion c of housing 0. Bolt 0? permits pivotal movement ofthe housing cjwith respect to the axle in the plane .of theaxle. lEach housingc is providdwith separate compartments and h. The uppercompartment gis closed by a cap g and the lower compartment byvcap h The spring is formed of upper and lower sections 2' and 70, respectively, secured together by.bolts j and pivoted to the frame by bracket Z. The ends of the upper section 2" are received within the compartment gfand carried by blocks of yielding nonrmetallic' material m The construction oi the compartments g andfblocks m is such that the ends of the spring section i will be relatively. fixed with respect to the housingaalthough the shocks and vibrations receive'd'ibyone will not be transmitted to the other.. Theends of the are received in blocks of yielot' ing non-metallic material a in the compartments h, the construction ofthese elements beingeach that a degree of cmovement between the ends of the spring and the housings 0 is permitted. [This shackle connection permits the ends of the springs to function independently inzcarrying the loadflof the, vehicle, thus permitting the era's to ride freely upon the roadbe'd. ",As the axle rises,the end of spring '2' isrelati vely fixed while that of spring hmove'sfinto :the compartment The difference in length between the spring sections action between the axle andframe; In idelower se tion is givesasnubbing.

sections thereof of the same flexibility in orand a pair of axles, a suspension for the frame I der that all of the units of non-metallicyieldcomprising a plurality of independent loading material may carry the same load and have the same pressure exerted thereon. By dividing the rubber commonly used to receive the spring ends into two portions, as described herein, a more efficient practical construction results, since the size of the individualparts-is not rendere-dexcessively large; While the invention has been described in connection with the specific construction shown in the accompanying drawings, itis not to be limited save as defined in the appended claims. i V I claim as my invention:

1. In combination with a vehicle frame and a pair'of axles, a suspension for thefr'ame carrymg spring sections, means to mount the sectlons as a unit upon the frame, a housing carried by each'axle, compartments 1n the I housings, and yielding non-metallic material i'n'the compartments for connecting the respe'ctive spring ends to the axles.

carrying spring sections, means to mount the sections as a un1t upon the frame, a housmg earned by each axle, yielding non-metallic ineansc'ari'ied the housing-s to connect the.

springs to the axles, and means to mount the housings pivotally to the axles. 7

- 6. In combination with avehicleframe and a pair of axles, a Suspension for the frame comprising a plurality of i ndependent loadcarry ngspring sections, means to mount the sections as avunit upon the frame, means to donnectthe endsof the springs to the axles,

and means to mountthe last named means pivetany upon theaaxles to swing upon an 4 axis parallel to that of the spring. comprising a plurality of independent load- This'specification signed this 10th day of FL'OYD EDSON DAVIS.

2. In combination with a vehicle frameand apai'r of axles, suspension for the frame comprising a plurality of independent load- 1' carrying spring 'section's,.means to mount the sections as a unit upon the frame, housings partments in the housings for receiving the ends of therespe'ctive spring sections, nonmetallic yielding material in the u per compartments to hold the ends of the upper spring relatively fixed with respect to the housings, and yielding non-metallic material in the lower compartments to receive the ends Carried by thaxles, lpp nd lower co'mn of the lowersp'ring, the last named yieldingmaterial permitting relative movement of the ends of the lower spring section with re- V sp et to the housing.

3. In combination with a vehicle frame and a pair of'a'xle's, asuspension for the frame comprising a plurality. of independent loadcarr'ylng spring sections, said sections being I I spaced one above the other, and one of the" 1 sections being lon er than the other, a house ing carried by each axle, and yielding nonmetallic material carried by the housings to connect the ends of the springs tothe'axle's,

5t. In combination with a vehicle frame and a pair of axles, a suspension for the frame comprising a plurality of independent load- V j us carrying sprlng sections, said. sections being spaced one above the other, and one of the sections being longer than the other, a housing carried by each axle, yielding non-metallic material carried bythe housings to engage the ends of the longer spring section I'ix'edly with respect to the housings,rand yielding non-metallic material carried by the housings to engage the ends of-the shorterspring to permit relative movement between such spring andthe housings. 7 '5; :In combination with a vehicle frame lie 

